<script>
import render from '../render/render.js'
 
    const components = {
        itemBtns(h, currentItem, index, list) {
            const { copyItem, deleteItem } = this.$listeners
            return [
            <span class="drawing-item-copy" title="复制" onClick={event => {
                copyItem(currentItem, list); event.stopPropagation()
            }}>
                <i class="el-icon-copy-document" />
            </span>,
            <span class="drawing-item-delete" title="删除" onClick={event => {
                deleteItem(index, list); event.stopPropagation()
            }}>
                <i class="el-icon-delete" />
            </span>
            ]
        }
    }
    const layouts = {
        colFormItem(h, currentItem, index, list) {
            const { activeItem } = this.$listeners
            const config = currentItem.__config__
            const child = renderChildren.apply(this, arguments)
            let className = this.activeId === config.formId ? 'drawing-item active-from-item' : 'drawing-item'
            if (this.formConf.unFocusedComponentBorder) className += ' unfocus-bordered'
            let labelWidth = config.labelWidth ? `${config.labelWidth}px` : null
            if (config.showLabel === false) labelWidth = '0'
            return (
            <el-col span={config.span} class={className}
                nativeOnClick={event => { activeItem(currentItem); event.stopPropagation() }}>
                <el-form-item label-width={labelWidth}
                label={config.showLabel ? config.label : ''} required={config.required}>
                <render key={config.renderKey} conf={currentItem} onInput={ event => {
                    this.$set(config, 'defaultValue', event)
                }}>
                    {child}
                </render>
                </el-form-item>
                {components.itemBtns.apply(this, arguments)}
            </el-col>
            )
        },
        rowFormItem(h, currentItem, index, list) {
            const { activeItem } = this.$listeners
            const config = currentItem.__config__
            const className = this.activeId === config.formId
            ? 'drawing-row-item active-from-item'
            : 'drawing-row-item'
            let child = renderChildren.apply(this, arguments)
            if (currentItem.type === 'flex') {
            child = <el-row type={currentItem.type} justify={currentItem.justify} align={currentItem.align}>
                    {child}
                    </el-row>
            }
            return (
            <el-col span={config.span}>
                <el-row gutter={config.gutter} class={className}
                nativeOnClick={event => { activeItem(currentItem); event.stopPropagation() }}>
                <span class="component-name">{config.componentName}</span>
                <draggable list={config.children || []} animation={340}
                    group="componentsGroup" class="drag-wrapper">
                    {child}
                </draggable>
                {components.itemBtns.apply(this, arguments)}
                </el-row>
            </el-col>
            )
        },
        raw(h, currentItem, index, list) {
            const config = currentItem.__config__
            const child = renderChildren.apply(this, arguments)
            return <render key={config.renderKey} conf={currentItem} onInput={ event => {
            this.$set(config, 'defaultValue', event)
            }}>
            {child}
            </render>
        }
    }

   function renderChildren(h, currentItem, index, list) {
       const config = currentItem.__config__
       if(!Array.isArray(config.children)) return null
       return config.children.map((el, i)=>{
           const layout = layouts[el.__config__.layout]
           if(layout) {
               return layout.call(this, h, el, i, config.children);
           }
           return layoutIsNotFound.call(this) 
       }) 
   }

   function layoutIsNotFound() {
     throw new Error(`没有与${this.currentItem.__config__.layout}匹配的layout`)
    }

    export default {
        components: {
            render
        },
         props: [
            'currentItem',
            'index',
            'drawingList',
            'activeId',
            'formConf'
        ],
        render(h) {
            const layout = layouts[this.currentItem.__config__.layout]
            if (layout) {
                console.log(layout.call);
                return layout.call(this, h, this.currentItem, this.index, this.drawingList)
            }
            return layoutIsNotFound.call(this)
        }
    }
</script>

<style lang="scss" scoped>

</style>